It is a nice little kit, but definitely they should have included a little piece of paper telling how to install or where to go to install. You can find the instructions in the KH9 user manual in pdf format. There is instructions in there. Note: I'm kind of surprise for the money you pay for the firearm.. they don't even provide a paper user manual with the firearm (KH9-SD). The jig provided is a blue 3D printed piece. Does the job, but it doesn't scream quality printed since they use the lowest fill rate. Also the print probably not the best orientation for the print. However as long as it works, it's fine.

Haven’t used it yet

Kit was a little tricky to install (pin is very tight) but overall not difficult to figure out. Once installed, the fit with the Suomi drum mag was extremely tight. It needed some work to get it in and out.

Perfect fit… in regards to the first review.. if you can’t figure how to install this without instructions, you have no business owning firearms… stick with rubber band guns.

Did not come with instructions so kind of useless. Where can one understand how to install